Dear Alexandre
I have tried your case, and it fails as you describe under vs8. However......
look at the first coordinate of your added constraint
float x=-10000,y=600;
bounds->push_back(osg::Vec3(x,y,getheight(x,y)));
x=1610,y=900;
all the other coordinates are near X=1600-2100. Your constraint is very (very,
very, very....) long and thin, and moreover x=-10000 is way outside the
terrain. I replaced the first coordinate with x=1000, and no problem the
triangulation is fine.
Is the -10000 correct (in terms of your problem)? I agree that ideally the
triangulator should triangulate absolutely anything, but you are probably near
the limits of floating point precision for such a long thin constraint. (other
cases of this error are sought).
Geoff
----- Original Message -----
From: amalric alexandre
To: osg users
Sent: Thursday, November 30, 2006 2:03 PM
Subject: Re: [osg-users] Delaunay triangulator of concav geometry
I found this morning that it's due to MS VS 2005 because I made a test
modifying the example "osgDelaunay.cpp" (attached) compiling on MS VS 2003
there is no problem, but compiling with MS VS 2005 the program crashes in
function lineBisects(delauneytriangulator.cpp) because of a "out of range" in
accessing array "points". It doesn't depend on OSG version (same problem with
OSG 1.2 and OSG 1.1).
Please see the attached files.
Thanks.
Alexandre AMALRIC
2006/11/30, jOan <[EMAIL PROTECTED]>:
I have the same problem using DelaunayTriangulator with MS VS2005.
2006/11/30, amalric alexandre <[EMAIL PROTECTED]>:
Hi,
I want to triangulate with DelaunayTriangulator a geometry wich is
concav. I give to the DelaunayTriangulator a set of point sorted and to the
DelaunayConstraint the same set of point (edges of the geometry). But when i
call the triangulate() function it crashes in lineBisects() function because of
a value out of range. Is it a known bug of triangulator ? or is my method not
appropriated ? If it is please explain how it is possible to triangulate a
concave geometry ?
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jOan Abadie
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